package com.cml.springcloud.controller;

import com.alibaba.csp.sentinel.annotation.SentinelResource;
import com.alibaba.csp.sentinel.slots.block.BlockException;
import com.cml.springcloud.entities.CommonResult;
import com.cml.springcloud.entities.Payment;
import com.cml.springcloud.service.PaymentService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;

/**
 * @author cml
 * @create 2021/4/28 15:40
 */
@RestController
@Slf4j
public class CircleBreakerController {
    @Value("${service-url.nacos-user-service}")
    private String SERVICE_URL;

    @Resource
    private RestTemplate restTemplate;

     //OpenFeign
    @Qualifier("paymentFallbackService")
    @Autowired
    private PaymentService paymentService;
//    @Resource
//    private PaymentService paymentService;

    @GetMapping("/consumer/paymentSQL/{id}")
    public CommonResult<Payment> paymentSQL(@PathVariable("id") Long id) {
        return paymentService.paymentSQL(id);
    }

    @GetMapping("/consumer/fallback/{id}")
//    @SentinelResource(value = "fallback") //未配置fallback方法，
//    @SentinelResource(value = "fallback",fallback = "handlerFallback") //配置fallback方法 处理运行时异常 只负责业务异常
//    @SentinelResource(value = "fallback",blockHandler = "blockHandler") //配置blockHandler 兜底方法 处理sentinel控制台配置时违规
    @SentinelResource(value = "fallback",
            fallback = "handlerFallback",
            blockHandler = "blockHandler",
            exceptionsToIgnore = {IllegalArgumentException.class}) //fallback blockhandler都配置 //exceptionsToIgnore 忽略属性，这儿忽略IllegalArgumentException异常
    public CommonResult fallback(@PathVariable("id") Long id){
        CommonResult<Payment> result = restTemplate.getForObject(SERVICE_URL+"/paymentSQL/"+id, CommonResult.class);
        if(id==4){
            throw new IllegalArgumentException("IllegalArgumentException,参数异常");
        }
        else if (result.getData() == null){
            throw new NullPointerException("NullPointerException,空指针异常");
        }
        return result;
    }

    //fallback 方法
    public CommonResult handlerFallback(@PathVariable  Long id,Throwable e) {
        Payment payment = new Payment(id,"null");
        return new CommonResult<>(444,"兜底异常handlerFallback,exception内容  "+e.getMessage(),payment);
    }

    //blockHandler
    public CommonResult blockHandler(@PathVariable  Long id, BlockException blockException) {
        Payment payment = new Payment(id,"null");
        return new CommonResult<>(445,"blockHandler-sentinel限流,无此流水: blockException  "+blockException.getMessage(),payment);
    }

}
